Henry 18Z temperature
1993       -   -40.1   -50.7   -56.7   -55.4   -59.2   -57.3       -       -       -   -35.1   -25.3
1994   -25.3   -40.9   -51.8   -55.5   -57.0   -53.4   -58.3       -       -       -   -35.0   -25.4
1995   -27.6   -38.0   -49.7   -56.3   -58.6   -55.6   -52.9   -60.3       -       -   -34.9   -23.4
1996   -26.4   -35.5   -54.1   -54.0   -59.1   -58.5   -53.9   -52.0       -       -   -32.4   -22.5
1997   -26.0   -40.0   -52.4   -55.4   -57.0   -54.7   -63.8   -58.4       -       -   -31.0   -23.4
1998   -24.5   -35.9   -51.5   -60.4   -56.9   -55.0   -57.2   -60.5       -       -   -34.2   -24.6
1999   -22.7   -38.1   -53.2   -59.0   -55.8   -56.5   -59.8   -55.6       -       -   -35.9   -27.0
2000   -26.5   -40.7   -53.5   -60.1   -58.0   -57.4   -59.5   -59.1       -       -   -30.6   -23.4
2001   -25.0   -38.1   -53.5   -57.6   -56.8   -54.8   -58.3   -61.5       -       -   -31.8   -22.8
2002   -23.2   -37.4   -48.0   -52.6   -53.9   -59.0   -52.8   -56.3       -       -   -36.1   -26.2
2003       -       -       -       -       -   -61.2   -61.4       -       -       -       -       -
2004       -       -       -       -       -       -       -       -       -       -       -       -
2005       -   -37.0   -51.2   -53.0   -57.8   -56.7   -60.5       -       -       -   -35.2   -20.3
2006   -24.3       -       -       -       -       -       -       -       -       -       -       -
2007       -       -       -       -       -       -       -       -       -       -       -       -
2008       -       -       -       -       -       -       -       -       -       -       -       -
2009       -       -       -       -       -       -       -       -       -       -       -       -